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Commit | Line | Data |
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57f9b7f8 AB |
1 | /** @file\r |
2 | DXE driver to expose the 'kernel', 'initrd' and 'cmdline' blobs\r | |
3 | provided by QEMU as files in an abstract file system\r | |
4 | \r | |
5 | Copyright (C) 2014-2016, Red Hat, Inc.\r | |
6 | Copyright (C) 2020, Arm, Limited.\r | |
7 | \r | |
8 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
9 | **/\r | |
10 | \r | |
11 | #include <PiDxe.h>\r | |
12 | \r | |
13 | #include <Guid/FileInfo.h>\r | |
14 | #include <Guid/FileSystemInfo.h>\r | |
15 | #include <Guid/FileSystemVolumeLabelInfo.h>\r | |
f98608ab | 16 | #include <Guid/LinuxEfiInitrdMedia.h>\r |
57f9b7f8 AB |
17 | #include <Guid/QemuKernelLoaderFsMedia.h>\r |
18 | #include <Library/BaseLib.h>\r | |
19 | #include <Library/BaseMemoryLib.h>\r | |
d10ad844 | 20 | #include <Library/BlobVerifierLib.h>\r |
57f9b7f8 | 21 | #include <Library/DebugLib.h>\r |
f98608ab | 22 | #include <Library/DevicePathLib.h>\r |
57f9b7f8 AB |
23 | #include <Library/MemoryAllocationLib.h>\r |
24 | #include <Library/QemuFwCfgLib.h>\r | |
25 | #include <Library/UefiBootServicesTableLib.h>\r | |
26 | #include <Library/UefiRuntimeServicesTableLib.h>\r | |
27 | #include <Protocol/DevicePath.h>\r | |
f98608ab | 28 | #include <Protocol/LoadFile2.h>\r |
57f9b7f8 AB |
29 | #include <Protocol/SimpleFileSystem.h>\r |
30 | \r | |
31 | //\r | |
32 | // Static data that hosts the fw_cfg blobs and serves file requests.\r | |
33 | //\r | |
34 | typedef enum {\r | |
35 | KernelBlobTypeKernel,\r | |
36 | KernelBlobTypeInitrd,\r | |
24b0e9d1 | 37 | KernelBlobTypeCommandLine,\r |
57f9b7f8 AB |
38 | KernelBlobTypeMax\r |
39 | } KERNEL_BLOB_TYPE;\r | |
40 | \r | |
41 | typedef struct {\r | |
ac0a286f | 42 | CONST CHAR16 Name[8];\r |
0758a8e9 | 43 | struct {\r |
ac0a286f MK |
44 | FIRMWARE_CONFIG_ITEM CONST SizeKey;\r |
45 | FIRMWARE_CONFIG_ITEM CONST DataKey;\r | |
46 | UINT32 Size;\r | |
0758a8e9 | 47 | } FwCfgItem[2];\r |
ac0a286f MK |
48 | UINT32 Size;\r |
49 | UINT8 *Data;\r | |
57f9b7f8 AB |
50 | } KERNEL_BLOB;\r |
51 | \r | |
ac0a286f | 52 | STATIC KERNEL_BLOB mKernelBlob[KernelBlobTypeMax] = {\r |
0758a8e9 AB |
53 | {\r |
54 | L"kernel",\r | |
55 | {\r | |
56 | { QemuFwCfgItemKernelSetupSize, QemuFwCfgItemKernelSetupData, },\r | |
57 | { QemuFwCfgItemKernelSize, QemuFwCfgItemKernelData, },\r | |
58 | }\r | |
ac0a286f | 59 | }, {\r |
0758a8e9 AB |
60 | L"initrd",\r |
61 | {\r | |
62 | { QemuFwCfgItemInitrdSize, QemuFwCfgItemInitrdData, },\r | |
63 | }\r | |
ac0a286f | 64 | }, {\r |
24b0e9d1 DM |
65 | L"cmdline",\r |
66 | {\r | |
67 | { QemuFwCfgItemCommandLineSize, QemuFwCfgItemCommandLineData, },\r | |
68 | }\r | |
0758a8e9 | 69 | }\r |
57f9b7f8 AB |
70 | };\r |
71 | \r | |
ac0a286f | 72 | STATIC UINT64 mTotalBlobBytes;\r |
57f9b7f8 AB |
73 | \r |
74 | //\r | |
75 | // Device path for the handle that incorporates our "EFI stub filesystem".\r | |
76 | //\r | |
77 | #pragma pack (1)\r | |
78 | typedef struct {\r | |
ac0a286f MK |
79 | VENDOR_DEVICE_PATH VenMediaNode;\r |
80 | EFI_DEVICE_PATH_PROTOCOL EndNode;\r | |
57f9b7f8 AB |
81 | } SINGLE_VENMEDIA_NODE_DEVPATH;\r |
82 | #pragma pack ()\r | |
83 | \r | |
ac0a286f | 84 | STATIC CONST SINGLE_VENMEDIA_NODE_DEVPATH mFileSystemDevicePath = {\r |
57f9b7f8 AB |
85 | {\r |
86 | {\r | |
87 | MEDIA_DEVICE_PATH, MEDIA_VENDOR_DP,\r | |
ac0a286f | 88 | { sizeof (VENDOR_DEVICE_PATH) }\r |
57f9b7f8 AB |
89 | },\r |
90 | QEMU_KERNEL_LOADER_FS_MEDIA_GUID\r | |
ac0a286f | 91 | }, {\r |
57f9b7f8 AB |
92 | END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE,\r |
93 | { sizeof (EFI_DEVICE_PATH_PROTOCOL) }\r | |
94 | }\r | |
95 | };\r | |
96 | \r | |
ac0a286f | 97 | STATIC CONST SINGLE_VENMEDIA_NODE_DEVPATH mInitrdDevicePath = {\r |
f98608ab AB |
98 | {\r |
99 | {\r | |
100 | MEDIA_DEVICE_PATH, MEDIA_VENDOR_DP,\r | |
ac0a286f | 101 | { sizeof (VENDOR_DEVICE_PATH) }\r |
f98608ab AB |
102 | },\r |
103 | LINUX_EFI_INITRD_MEDIA_GUID\r | |
ac0a286f | 104 | }, {\r |
f98608ab AB |
105 | END_DEVICE_PATH_TYPE, END_ENTIRE_DEVICE_PATH_SUBTYPE,\r |
106 | { sizeof (EFI_DEVICE_PATH_PROTOCOL) }\r | |
107 | }\r | |
108 | };\r | |
109 | \r | |
57f9b7f8 AB |
110 | //\r |
111 | // The "file in the EFI stub filesystem" abstraction.\r | |
112 | //\r | |
ac0a286f | 113 | STATIC EFI_TIME mInitTime;\r |
57f9b7f8 | 114 | \r |
ac0a286f | 115 | #define STUB_FILE_SIG SIGNATURE_64 ('S', 'T', 'U', 'B', 'F', 'I', 'L', 'E')\r |
57f9b7f8 AB |
116 | \r |
117 | typedef struct {\r | |
ac0a286f | 118 | UINT64 Signature; // Carries STUB_FILE_SIG.\r |
57f9b7f8 | 119 | \r |
ac0a286f MK |
120 | KERNEL_BLOB_TYPE BlobType; // Index into mKernelBlob. KernelBlobTypeMax\r |
121 | // denotes the root directory of the filesystem.\r | |
57f9b7f8 | 122 | \r |
ac0a286f MK |
123 | UINT64 Position; // Byte position for regular files;\r |
124 | // next directory entry to return for the root\r | |
125 | // directory.\r | |
57f9b7f8 | 126 | \r |
ac0a286f | 127 | EFI_FILE_PROTOCOL File; // Standard protocol interface.\r |
57f9b7f8 AB |
128 | } STUB_FILE;\r |
129 | \r | |
130 | #define STUB_FILE_FROM_FILE(FilePointer) \\r | |
131 | CR (FilePointer, STUB_FILE, File, STUB_FILE_SIG)\r | |
132 | \r | |
57f9b7f8 AB |
133 | //\r |
134 | // Protocol member functions for File.\r | |
135 | //\r | |
136 | \r | |
137 | /**\r | |
138 | Opens a new file relative to the source file's location.\r | |
139 | \r | |
40d572f7 AB |
140 | (Forward declaration.)\r |
141 | \r | |
57f9b7f8 AB |
142 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is\r |
143 | the file handle to the source location. This would\r | |
144 | typically be an open handle to a directory.\r | |
145 | \r | |
146 | @param[out] NewHandle A pointer to the location to return the opened handle\r | |
147 | for the new file.\r | |
148 | \r | |
149 | @param[in] FileName The Null-terminated string of the name of the file to\r | |
150 | be opened. The file name may contain the following\r | |
151 | path modifiers: "\", ".", and "..".\r | |
152 | \r | |
153 | @param[in] OpenMode The mode to open the file. The only valid\r | |
154 | combinations that the file may be opened with are:\r | |
155 | Read, Read/Write, or Create/Read/Write.\r | |
156 | \r | |
157 | @param[in] Attributes Only valid for EFI_FILE_MODE_CREATE, in which case\r | |
158 | these are the attribute bits for the newly created\r | |
159 | file.\r | |
160 | \r | |
161 | @retval EFI_SUCCESS The file was opened.\r | |
162 | @retval EFI_NOT_FOUND The specified file could not be found on the\r | |
163 | device.\r | |
164 | @retval EFI_NO_MEDIA The device has no medium.\r | |
165 | @retval EFI_MEDIA_CHANGED The device has a different medium in it or the\r | |
166 | medium is no longer supported.\r | |
167 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
168 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
169 | @retval EFI_WRITE_PROTECTED An attempt was made to create a file, or open a\r | |
170 | file for write when the media is\r | |
171 | write-protected.\r | |
172 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
173 | @retval EFI_OUT_OF_RESOURCES Not enough resources were available to open the\r | |
174 | file.\r | |
175 | @retval EFI_VOLUME_FULL The volume is full.\r | |
176 | **/\r | |
177 | STATIC\r | |
178 | EFI_STATUS\r | |
179 | EFIAPI\r | |
180 | StubFileOpen (\r | |
ac0a286f MK |
181 | IN EFI_FILE_PROTOCOL *This,\r |
182 | OUT EFI_FILE_PROTOCOL **NewHandle,\r | |
183 | IN CHAR16 *FileName,\r | |
184 | IN UINT64 OpenMode,\r | |
185 | IN UINT64 Attributes\r | |
40d572f7 | 186 | );\r |
57f9b7f8 AB |
187 | \r |
188 | /**\r | |
189 | Closes a specified file handle.\r | |
190 | \r | |
191 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the file\r | |
192 | handle to close.\r | |
193 | \r | |
194 | @retval EFI_SUCCESS The file was closed.\r | |
195 | **/\r | |
196 | STATIC\r | |
197 | EFI_STATUS\r | |
198 | EFIAPI\r | |
199 | StubFileClose (\r | |
ac0a286f | 200 | IN EFI_FILE_PROTOCOL *This\r |
57f9b7f8 AB |
201 | )\r |
202 | {\r | |
203 | FreePool (STUB_FILE_FROM_FILE (This));\r | |
204 | return EFI_SUCCESS;\r | |
205 | }\r | |
206 | \r | |
57f9b7f8 AB |
207 | /**\r |
208 | Close and delete the file handle.\r | |
209 | \r | |
210 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
211 | handle to the file to delete.\r | |
212 | \r | |
213 | @retval EFI_SUCCESS The file was closed and deleted, and the\r | |
214 | handle was closed.\r | |
215 | @retval EFI_WARN_DELETE_FAILURE The handle was closed, but the file was not\r | |
216 | deleted.\r | |
217 | \r | |
218 | **/\r | |
219 | STATIC\r | |
220 | EFI_STATUS\r | |
221 | EFIAPI\r | |
222 | StubFileDelete (\r | |
ac0a286f | 223 | IN EFI_FILE_PROTOCOL *This\r |
57f9b7f8 AB |
224 | )\r |
225 | {\r | |
226 | FreePool (STUB_FILE_FROM_FILE (This));\r | |
227 | return EFI_WARN_DELETE_FAILURE;\r | |
228 | }\r | |
229 | \r | |
57f9b7f8 AB |
230 | /**\r |
231 | Helper function that formats an EFI_FILE_INFO structure into the\r | |
232 | user-allocated buffer, for any valid KERNEL_BLOB_TYPE value (including\r | |
233 | KernelBlobTypeMax, which stands for the root directory).\r | |
234 | \r | |
235 | The interface follows the EFI_FILE_GET_INFO -- and for directories, the\r | |
236 | EFI_FILE_READ -- interfaces.\r | |
237 | \r | |
238 | @param[in] BlobType The KERNEL_BLOB_TYPE value identifying the fw_cfg\r | |
239 | blob backing the STUB_FILE that information is\r | |
240 | being requested about. If BlobType equals\r | |
241 | KernelBlobTypeMax, then information will be\r | |
242 | provided about the root directory of the\r | |
243 | filesystem.\r | |
244 | \r | |
245 | @param[in,out] BufferSize On input, the size of Buffer. On output, the\r | |
246 | amount of data returned in Buffer. In both cases,\r | |
247 | the size is measured in bytes.\r | |
248 | \r | |
249 | @param[out] Buffer A pointer to the data buffer to return. The\r | |
250 | buffer's type is EFI_FILE_INFO.\r | |
251 | \r | |
252 | @retval EFI_SUCCESS The information was returned.\r | |
253 | @retval EFI_BUFFER_TOO_SMALL BufferSize is too small to store the\r | |
254 | EFI_FILE_INFO structure. BufferSize has been\r | |
255 | updated with the size needed to complete the\r | |
256 | request.\r | |
257 | **/\r | |
258 | STATIC\r | |
259 | EFI_STATUS\r | |
260 | ConvertKernelBlobTypeToFileInfo (\r | |
ac0a286f MK |
261 | IN KERNEL_BLOB_TYPE BlobType,\r |
262 | IN OUT UINTN *BufferSize,\r | |
263 | OUT VOID *Buffer\r | |
57f9b7f8 AB |
264 | )\r |
265 | {\r | |
266 | CONST CHAR16 *Name;\r | |
267 | UINT64 FileSize;\r | |
268 | UINT64 Attribute;\r | |
269 | \r | |
ac0a286f MK |
270 | UINTN NameSize;\r |
271 | UINTN FileInfoSize;\r | |
272 | EFI_FILE_INFO *FileInfo;\r | |
273 | UINTN OriginalBufferSize;\r | |
57f9b7f8 AB |
274 | \r |
275 | if (BlobType == KernelBlobTypeMax) {\r | |
276 | //\r | |
277 | // getting file info about the root directory\r | |
278 | //\r | |
279 | Name = L"\\";\r | |
280 | FileSize = KernelBlobTypeMax;\r | |
281 | Attribute = EFI_FILE_READ_ONLY | EFI_FILE_DIRECTORY;\r | |
282 | } else {\r | |
ac0a286f | 283 | CONST KERNEL_BLOB *Blob;\r |
57f9b7f8 AB |
284 | \r |
285 | Blob = &mKernelBlob[BlobType];\r | |
286 | Name = Blob->Name;\r | |
287 | FileSize = Blob->Size;\r | |
288 | Attribute = EFI_FILE_READ_ONLY;\r | |
289 | }\r | |
290 | \r | |
ac0a286f | 291 | NameSize = (StrLen (Name) + 1) * 2;\r |
57f9b7f8 AB |
292 | FileInfoSize = OFFSET_OF (EFI_FILE_INFO, FileName) + NameSize;\r |
293 | ASSERT (FileInfoSize >= sizeof *FileInfo);\r | |
294 | \r | |
295 | OriginalBufferSize = *BufferSize;\r | |
296 | *BufferSize = FileInfoSize;\r | |
297 | if (OriginalBufferSize < *BufferSize) {\r | |
298 | return EFI_BUFFER_TOO_SMALL;\r | |
299 | }\r | |
300 | \r | |
301 | FileInfo = (EFI_FILE_INFO *)Buffer;\r | |
302 | FileInfo->Size = FileInfoSize;\r | |
303 | FileInfo->FileSize = FileSize;\r | |
304 | FileInfo->PhysicalSize = FileSize;\r | |
305 | FileInfo->Attribute = Attribute;\r | |
306 | \r | |
ac0a286f MK |
307 | CopyMem (&FileInfo->CreateTime, &mInitTime, sizeof mInitTime);\r |
308 | CopyMem (&FileInfo->LastAccessTime, &mInitTime, sizeof mInitTime);\r | |
57f9b7f8 | 309 | CopyMem (&FileInfo->ModificationTime, &mInitTime, sizeof mInitTime);\r |
ac0a286f | 310 | CopyMem (FileInfo->FileName, Name, NameSize);\r |
57f9b7f8 AB |
311 | \r |
312 | return EFI_SUCCESS;\r | |
313 | }\r | |
314 | \r | |
57f9b7f8 AB |
315 | /**\r |
316 | Reads data from a file, or continues scanning a directory.\r | |
317 | \r | |
318 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that\r | |
319 | is the file handle to read data from.\r | |
320 | \r | |
321 | @param[in,out] BufferSize On input, the size of the Buffer. On output, the\r | |
322 | amount of data returned in Buffer. In both cases,\r | |
323 | the size is measured in bytes. If the read goes\r | |
324 | beyond the end of the file, the read length is\r | |
325 | truncated to the end of the file.\r | |
326 | \r | |
327 | If This is a directory, the function reads the\r | |
328 | directory entry at the current position and\r | |
329 | returns the entry (as EFI_FILE_INFO) in Buffer. If\r | |
330 | there are no more directory entries, the\r | |
331 | BufferSize is set to zero on output.\r | |
332 | \r | |
333 | @param[out] Buffer The buffer into which the data is read.\r | |
334 | \r | |
335 | @retval EFI_SUCCESS Data was read.\r | |
336 | @retval EFI_NO_MEDIA The device has no medium.\r | |
337 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
338 | @retval EFI_DEVICE_ERROR An attempt was made to read from a deleted\r | |
339 | file.\r | |
340 | @retval EFI_DEVICE_ERROR On entry, the current file position is beyond\r | |
341 | the end of the file.\r | |
342 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
343 | @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to store the\r | |
344 | current directory entry as a EFI_FILE_INFO\r | |
345 | structure. BufferSize has been updated with the\r | |
346 | size needed to complete the request, and the\r | |
347 | directory position has not been advanced.\r | |
348 | **/\r | |
349 | STATIC\r | |
350 | EFI_STATUS\r | |
351 | EFIAPI\r | |
352 | StubFileRead (\r | |
ac0a286f MK |
353 | IN EFI_FILE_PROTOCOL *This,\r |
354 | IN OUT UINTN *BufferSize,\r | |
355 | OUT VOID *Buffer\r | |
57f9b7f8 AB |
356 | )\r |
357 | {\r | |
ac0a286f MK |
358 | STUB_FILE *StubFile;\r |
359 | CONST KERNEL_BLOB *Blob;\r | |
360 | UINT64 Left;\r | |
57f9b7f8 AB |
361 | \r |
362 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
363 | \r | |
364 | //\r | |
365 | // Scanning the root directory?\r | |
366 | //\r | |
367 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
ac0a286f | 368 | EFI_STATUS Status;\r |
57f9b7f8 AB |
369 | \r |
370 | if (StubFile->Position == KernelBlobTypeMax) {\r | |
371 | //\r | |
372 | // Scanning complete.\r | |
373 | //\r | |
374 | *BufferSize = 0;\r | |
375 | return EFI_SUCCESS;\r | |
376 | }\r | |
377 | \r | |
378 | Status = ConvertKernelBlobTypeToFileInfo (\r | |
379 | (KERNEL_BLOB_TYPE)StubFile->Position,\r | |
380 | BufferSize,\r | |
ac0a286f MK |
381 | Buffer\r |
382 | );\r | |
57f9b7f8 AB |
383 | if (EFI_ERROR (Status)) {\r |
384 | return Status;\r | |
385 | }\r | |
386 | \r | |
387 | ++StubFile->Position;\r | |
388 | return EFI_SUCCESS;\r | |
389 | }\r | |
390 | \r | |
391 | //\r | |
392 | // Reading a file.\r | |
393 | //\r | |
394 | Blob = &mKernelBlob[StubFile->BlobType];\r | |
395 | if (StubFile->Position > Blob->Size) {\r | |
396 | return EFI_DEVICE_ERROR;\r | |
397 | }\r | |
398 | \r | |
399 | Left = Blob->Size - StubFile->Position;\r | |
400 | if (*BufferSize > Left) {\r | |
401 | *BufferSize = (UINTN)Left;\r | |
402 | }\r | |
ac0a286f | 403 | \r |
57f9b7f8 AB |
404 | if (Blob->Data != NULL) {\r |
405 | CopyMem (Buffer, Blob->Data + StubFile->Position, *BufferSize);\r | |
406 | }\r | |
ac0a286f | 407 | \r |
57f9b7f8 AB |
408 | StubFile->Position += *BufferSize;\r |
409 | return EFI_SUCCESS;\r | |
410 | }\r | |
411 | \r | |
57f9b7f8 AB |
412 | /**\r |
413 | Writes data to a file.\r | |
414 | \r | |
415 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that\r | |
416 | is the file handle to write data to.\r | |
417 | \r | |
418 | @param[in,out] BufferSize On input, the size of the Buffer. On output, the\r | |
419 | amount of data actually written. In both cases,\r | |
420 | the size is measured in bytes.\r | |
421 | \r | |
422 | @param[in] Buffer The buffer of data to write.\r | |
423 | \r | |
424 | @retval EFI_SUCCESS Data was written.\r | |
425 | @retval EFI_UNSUPPORTED Writes to open directory files are not\r | |
426 | supported.\r | |
427 | @retval EFI_NO_MEDIA The device has no medium.\r | |
428 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
429 | @retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.\r | |
430 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
431 | @retval EFI_WRITE_PROTECTED The file or medium is write-protected.\r | |
432 | @retval EFI_ACCESS_DENIED The file was opened read only.\r | |
433 | @retval EFI_VOLUME_FULL The volume is full.\r | |
434 | **/\r | |
435 | STATIC\r | |
436 | EFI_STATUS\r | |
437 | EFIAPI\r | |
438 | StubFileWrite (\r | |
ac0a286f MK |
439 | IN EFI_FILE_PROTOCOL *This,\r |
440 | IN OUT UINTN *BufferSize,\r | |
441 | IN VOID *Buffer\r | |
57f9b7f8 AB |
442 | )\r |
443 | {\r | |
ac0a286f | 444 | STUB_FILE *StubFile;\r |
57f9b7f8 AB |
445 | \r |
446 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
447 | return (StubFile->BlobType == KernelBlobTypeMax) ?\r | |
448 | EFI_UNSUPPORTED :\r | |
449 | EFI_WRITE_PROTECTED;\r | |
450 | }\r | |
451 | \r | |
57f9b7f8 AB |
452 | /**\r |
453 | Returns a file's current position.\r | |
454 | \r | |
455 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
456 | file handle to get the current position on.\r | |
457 | \r | |
458 | @param[out] Position The address to return the file's current position\r | |
459 | value.\r | |
460 | \r | |
461 | @retval EFI_SUCCESS The position was returned.\r | |
462 | @retval EFI_UNSUPPORTED The request is not valid on open directories.\r | |
463 | @retval EFI_DEVICE_ERROR An attempt was made to get the position from a\r | |
464 | deleted file.\r | |
465 | **/\r | |
466 | STATIC\r | |
467 | EFI_STATUS\r | |
468 | EFIAPI\r | |
469 | StubFileGetPosition (\r | |
ac0a286f MK |
470 | IN EFI_FILE_PROTOCOL *This,\r |
471 | OUT UINT64 *Position\r | |
57f9b7f8 AB |
472 | )\r |
473 | {\r | |
ac0a286f | 474 | STUB_FILE *StubFile;\r |
57f9b7f8 AB |
475 | \r |
476 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
477 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
478 | return EFI_UNSUPPORTED;\r | |
479 | }\r | |
480 | \r | |
481 | *Position = StubFile->Position;\r | |
482 | return EFI_SUCCESS;\r | |
483 | }\r | |
484 | \r | |
57f9b7f8 AB |
485 | /**\r |
486 | Sets a file's current position.\r | |
487 | \r | |
488 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
489 | file handle to set the requested position on.\r | |
490 | \r | |
491 | @param[in] Position The byte position from the start of the file to set. For\r | |
492 | regular files, MAX_UINT64 means "seek to end". For\r | |
493 | directories, zero means "rewind directory scan".\r | |
494 | \r | |
495 | @retval EFI_SUCCESS The position was set.\r | |
496 | @retval EFI_UNSUPPORTED The seek request for nonzero is not valid on open\r | |
497 | directories.\r | |
498 | @retval EFI_DEVICE_ERROR An attempt was made to set the position of a\r | |
499 | deleted file.\r | |
500 | **/\r | |
501 | STATIC\r | |
502 | EFI_STATUS\r | |
503 | EFIAPI\r | |
504 | StubFileSetPosition (\r | |
ac0a286f MK |
505 | IN EFI_FILE_PROTOCOL *This,\r |
506 | IN UINT64 Position\r | |
57f9b7f8 AB |
507 | )\r |
508 | {\r | |
ac0a286f MK |
509 | STUB_FILE *StubFile;\r |
510 | KERNEL_BLOB *Blob;\r | |
57f9b7f8 AB |
511 | \r |
512 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
513 | \r | |
514 | if (StubFile->BlobType == KernelBlobTypeMax) {\r | |
515 | if (Position == 0) {\r | |
516 | //\r | |
517 | // rewinding a directory scan is allowed\r | |
518 | //\r | |
519 | StubFile->Position = 0;\r | |
520 | return EFI_SUCCESS;\r | |
521 | }\r | |
ac0a286f | 522 | \r |
57f9b7f8 AB |
523 | return EFI_UNSUPPORTED;\r |
524 | }\r | |
525 | \r | |
526 | //\r | |
527 | // regular file seek\r | |
528 | //\r | |
529 | Blob = &mKernelBlob[StubFile->BlobType];\r | |
530 | if (Position == MAX_UINT64) {\r | |
531 | //\r | |
532 | // seek to end\r | |
533 | //\r | |
534 | StubFile->Position = Blob->Size;\r | |
535 | } else {\r | |
536 | //\r | |
537 | // absolute seek from beginning -- seeking past the end is allowed\r | |
538 | //\r | |
539 | StubFile->Position = Position;\r | |
540 | }\r | |
ac0a286f | 541 | \r |
57f9b7f8 AB |
542 | return EFI_SUCCESS;\r |
543 | }\r | |
544 | \r | |
57f9b7f8 AB |
545 | /**\r |
546 | Returns information about a file.\r | |
547 | \r | |
548 | @param[in] This A pointer to the EFI_FILE_PROTOCOL instance\r | |
549 | that is the file handle the requested\r | |
550 | information is for.\r | |
551 | \r | |
552 | @param[in] InformationType The type identifier GUID for the information\r | |
553 | being requested. The following information\r | |
554 | types are supported, storing the\r | |
555 | corresponding structures in Buffer:\r | |
556 | \r | |
557 | - gEfiFileInfoGuid: EFI_FILE_INFO\r | |
558 | \r | |
559 | - gEfiFileSystemInfoGuid:\r | |
560 | EFI_FILE_SYSTEM_INFO\r | |
561 | \r | |
562 | - gEfiFileSystemVolumeLabelInfoIdGuid:\r | |
563 | EFI_FILE_SYSTEM_VOLUME_LABEL\r | |
564 | \r | |
565 | @param[in,out] BufferSize On input, the size of Buffer. On output, the\r | |
566 | amount of data returned in Buffer. In both\r | |
567 | cases, the size is measured in bytes.\r | |
568 | \r | |
569 | @param[out] Buffer A pointer to the data buffer to return. The\r | |
570 | buffer's type is indicated by\r | |
571 | InformationType.\r | |
572 | \r | |
573 | @retval EFI_SUCCESS The information was returned.\r | |
574 | @retval EFI_UNSUPPORTED The InformationType is not known.\r | |
575 | @retval EFI_NO_MEDIA The device has no medium.\r | |
576 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
577 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
578 | @retval EFI_BUFFER_TOO_SMALL The BufferSize is too small to store the\r | |
579 | information structure requested by\r | |
580 | InformationType. BufferSize has been updated\r | |
581 | with the size needed to complete the request.\r | |
582 | **/\r | |
583 | STATIC\r | |
584 | EFI_STATUS\r | |
585 | EFIAPI\r | |
586 | StubFileGetInfo (\r | |
ac0a286f MK |
587 | IN EFI_FILE_PROTOCOL *This,\r |
588 | IN EFI_GUID *InformationType,\r | |
589 | IN OUT UINTN *BufferSize,\r | |
590 | OUT VOID *Buffer\r | |
57f9b7f8 AB |
591 | )\r |
592 | {\r | |
ac0a286f MK |
593 | CONST STUB_FILE *StubFile;\r |
594 | UINTN OriginalBufferSize;\r | |
57f9b7f8 AB |
595 | \r |
596 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
597 | \r | |
598 | if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {\r | |
ac0a286f MK |
599 | return ConvertKernelBlobTypeToFileInfo (\r |
600 | StubFile->BlobType,\r | |
601 | BufferSize,\r | |
602 | Buffer\r | |
603 | );\r | |
57f9b7f8 AB |
604 | }\r |
605 | \r | |
606 | OriginalBufferSize = *BufferSize;\r | |
607 | \r | |
608 | if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {\r | |
ac0a286f | 609 | EFI_FILE_SYSTEM_INFO *FileSystemInfo;\r |
57f9b7f8 AB |
610 | \r |
611 | *BufferSize = sizeof *FileSystemInfo;\r | |
612 | if (OriginalBufferSize < *BufferSize) {\r | |
613 | return EFI_BUFFER_TOO_SMALL;\r | |
614 | }\r | |
615 | \r | |
616 | FileSystemInfo = (EFI_FILE_SYSTEM_INFO *)Buffer;\r | |
617 | FileSystemInfo->Size = sizeof *FileSystemInfo;\r | |
618 | FileSystemInfo->ReadOnly = TRUE;\r | |
619 | FileSystemInfo->VolumeSize = mTotalBlobBytes;\r | |
620 | FileSystemInfo->FreeSpace = 0;\r | |
621 | FileSystemInfo->BlockSize = 1;\r | |
622 | FileSystemInfo->VolumeLabel[0] = L'\0';\r | |
623 | \r | |
624 | return EFI_SUCCESS;\r | |
625 | }\r | |
626 | \r | |
627 | if (CompareGuid (InformationType, &gEfiFileSystemVolumeLabelInfoIdGuid)) {\r | |
ac0a286f | 628 | EFI_FILE_SYSTEM_VOLUME_LABEL *FileSystemVolumeLabel;\r |
57f9b7f8 AB |
629 | \r |
630 | *BufferSize = sizeof *FileSystemVolumeLabel;\r | |
631 | if (OriginalBufferSize < *BufferSize) {\r | |
632 | return EFI_BUFFER_TOO_SMALL;\r | |
633 | }\r | |
634 | \r | |
ac0a286f | 635 | FileSystemVolumeLabel = (EFI_FILE_SYSTEM_VOLUME_LABEL *)Buffer;\r |
57f9b7f8 AB |
636 | FileSystemVolumeLabel->VolumeLabel[0] = L'\0';\r |
637 | \r | |
638 | return EFI_SUCCESS;\r | |
639 | }\r | |
640 | \r | |
641 | return EFI_UNSUPPORTED;\r | |
642 | }\r | |
643 | \r | |
57f9b7f8 AB |
644 | /**\r |
645 | Sets information about a file.\r | |
646 | \r | |
647 | @param[in] File A pointer to the EFI_FILE_PROTOCOL instance that\r | |
648 | is the file handle the information is for.\r | |
649 | \r | |
650 | @param[in] InformationType The type identifier for the information being\r | |
651 | set.\r | |
652 | \r | |
653 | @param[in] BufferSize The size, in bytes, of Buffer.\r | |
654 | \r | |
655 | @param[in] Buffer A pointer to the data buffer to write. The\r | |
656 | buffer's type is indicated by InformationType.\r | |
657 | \r | |
658 | @retval EFI_SUCCESS The information was set.\r | |
659 | @retval EFI_UNSUPPORTED The InformationType is not known.\r | |
660 | @retval EFI_NO_MEDIA The device has no medium.\r | |
661 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
662 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
663 | @retval EFI_WRITE_PROTECTED InformationType is EFI_FILE_INFO_ID and the\r | |
664 | media is read-only.\r | |
665 | @retval EFI_WRITE_PROTECTED InformationType is\r | |
666 | EFI_FILE_PROTOCOL_SYSTEM_INFO_ID and the media\r | |
667 | is read only.\r | |
668 | @retval EFI_WRITE_PROTECTED InformationType is\r | |
669 | EFI_FILE_SYSTEM_VOLUME_LABEL_ID and the media\r | |
670 | is read-only.\r | |
671 | @retval EFI_ACCESS_DENIED An attempt is made to change the name of a file\r | |
672 | to a file that is already present.\r | |
673 | @retval EFI_ACCESS_DENIED An attempt is being made to change the\r | |
674 | EFI_FILE_DIRECTORY Attribute.\r | |
675 | @retval EFI_ACCESS_DENIED An attempt is being made to change the size of\r | |
676 | a directory.\r | |
677 | @retval EFI_ACCESS_DENIED InformationType is EFI_FILE_INFO_ID and the\r | |
678 | file was opened read-only and an attempt is\r | |
679 | being made to modify a field other than\r | |
680 | Attribute.\r | |
681 | @retval EFI_VOLUME_FULL The volume is full.\r | |
682 | @retval EFI_BAD_BUFFER_SIZE BufferSize is smaller than the size of the type\r | |
683 | indicated by InformationType.\r | |
684 | **/\r | |
685 | STATIC\r | |
686 | EFI_STATUS\r | |
687 | EFIAPI\r | |
688 | StubFileSetInfo (\r | |
ac0a286f MK |
689 | IN EFI_FILE_PROTOCOL *This,\r |
690 | IN EFI_GUID *InformationType,\r | |
691 | IN UINTN BufferSize,\r | |
692 | IN VOID *Buffer\r | |
57f9b7f8 AB |
693 | )\r |
694 | {\r | |
695 | return EFI_WRITE_PROTECTED;\r | |
696 | }\r | |
697 | \r | |
57f9b7f8 AB |
698 | /**\r |
699 | Flushes all modified data associated with a file to a device.\r | |
700 | \r | |
701 | @param [in] This A pointer to the EFI_FILE_PROTOCOL instance that is the\r | |
702 | file handle to flush.\r | |
703 | \r | |
704 | @retval EFI_SUCCESS The data was flushed.\r | |
705 | @retval EFI_NO_MEDIA The device has no medium.\r | |
706 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
707 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
708 | @retval EFI_WRITE_PROTECTED The file or medium is write-protected.\r | |
709 | @retval EFI_ACCESS_DENIED The file was opened read-only.\r | |
710 | @retval EFI_VOLUME_FULL The volume is full.\r | |
711 | **/\r | |
712 | STATIC\r | |
713 | EFI_STATUS\r | |
714 | EFIAPI\r | |
715 | StubFileFlush (\r | |
ac0a286f | 716 | IN EFI_FILE_PROTOCOL *This\r |
57f9b7f8 AB |
717 | )\r |
718 | {\r | |
719 | return EFI_WRITE_PROTECTED;\r | |
720 | }\r | |
721 | \r | |
722 | //\r | |
723 | // External definition of the file protocol template.\r | |
724 | //\r | |
ac0a286f | 725 | STATIC CONST EFI_FILE_PROTOCOL mEfiFileProtocolTemplate = {\r |
57f9b7f8 AB |
726 | EFI_FILE_PROTOCOL_REVISION, // revision 1\r |
727 | StubFileOpen,\r | |
728 | StubFileClose,\r | |
729 | StubFileDelete,\r | |
730 | StubFileRead,\r | |
731 | StubFileWrite,\r | |
732 | StubFileGetPosition,\r | |
733 | StubFileSetPosition,\r | |
734 | StubFileGetInfo,\r | |
735 | StubFileSetInfo,\r | |
736 | StubFileFlush,\r | |
737 | NULL, // OpenEx, revision 2\r | |
738 | NULL, // ReadEx, revision 2\r | |
739 | NULL, // WriteEx, revision 2\r | |
740 | NULL // FlushEx, revision 2\r | |
741 | };\r | |
742 | \r | |
40d572f7 AB |
743 | STATIC\r |
744 | EFI_STATUS\r | |
745 | EFIAPI\r | |
746 | StubFileOpen (\r | |
ac0a286f MK |
747 | IN EFI_FILE_PROTOCOL *This,\r |
748 | OUT EFI_FILE_PROTOCOL **NewHandle,\r | |
749 | IN CHAR16 *FileName,\r | |
750 | IN UINT64 OpenMode,\r | |
751 | IN UINT64 Attributes\r | |
40d572f7 AB |
752 | )\r |
753 | {\r | |
ac0a286f MK |
754 | CONST STUB_FILE *StubFile;\r |
755 | UINTN BlobType;\r | |
756 | STUB_FILE *NewStubFile;\r | |
40d572f7 AB |
757 | \r |
758 | //\r | |
759 | // We're read-only.\r | |
760 | //\r | |
761 | switch (OpenMode) {\r | |
762 | case EFI_FILE_MODE_READ:\r | |
763 | break;\r | |
764 | \r | |
765 | case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE:\r | |
766 | case EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE:\r | |
767 | return EFI_WRITE_PROTECTED;\r | |
768 | \r | |
769 | default:\r | |
770 | return EFI_INVALID_PARAMETER;\r | |
771 | }\r | |
772 | \r | |
773 | //\r | |
774 | // Only the root directory supports opening files in it.\r | |
775 | //\r | |
776 | StubFile = STUB_FILE_FROM_FILE (This);\r | |
777 | if (StubFile->BlobType != KernelBlobTypeMax) {\r | |
778 | return EFI_UNSUPPORTED;\r | |
779 | }\r | |
780 | \r | |
781 | //\r | |
782 | // Locate the file.\r | |
783 | //\r | |
784 | for (BlobType = 0; BlobType < KernelBlobTypeMax; ++BlobType) {\r | |
785 | if (StrCmp (FileName, mKernelBlob[BlobType].Name) == 0) {\r | |
786 | break;\r | |
787 | }\r | |
788 | }\r | |
ac0a286f | 789 | \r |
40d572f7 AB |
790 | if (BlobType == KernelBlobTypeMax) {\r |
791 | return EFI_NOT_FOUND;\r | |
792 | }\r | |
793 | \r | |
794 | //\r | |
795 | // Found it.\r | |
796 | //\r | |
797 | NewStubFile = AllocatePool (sizeof *NewStubFile);\r | |
798 | if (NewStubFile == NULL) {\r | |
799 | return EFI_OUT_OF_RESOURCES;\r | |
800 | }\r | |
801 | \r | |
802 | NewStubFile->Signature = STUB_FILE_SIG;\r | |
803 | NewStubFile->BlobType = (KERNEL_BLOB_TYPE)BlobType;\r | |
804 | NewStubFile->Position = 0;\r | |
ac0a286f MK |
805 | CopyMem (\r |
806 | &NewStubFile->File,\r | |
807 | &mEfiFileProtocolTemplate,\r | |
808 | sizeof mEfiFileProtocolTemplate\r | |
809 | );\r | |
40d572f7 AB |
810 | *NewHandle = &NewStubFile->File;\r |
811 | \r | |
812 | return EFI_SUCCESS;\r | |
813 | }\r | |
814 | \r | |
57f9b7f8 AB |
815 | //\r |
816 | // Protocol member functions for SimpleFileSystem.\r | |
817 | //\r | |
818 | \r | |
819 | /**\r | |
820 | Open the root directory on a volume.\r | |
821 | \r | |
822 | @param[in] This A pointer to the volume to open the root directory on.\r | |
823 | \r | |
824 | @param[out] Root A pointer to the location to return the opened file handle\r | |
825 | for the root directory in.\r | |
826 | \r | |
827 | @retval EFI_SUCCESS The device was opened.\r | |
828 | @retval EFI_UNSUPPORTED This volume does not support the requested file\r | |
829 | system type.\r | |
830 | @retval EFI_NO_MEDIA The device has no medium.\r | |
831 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
832 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
833 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
834 | @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of\r | |
835 | resources.\r | |
836 | @retval EFI_MEDIA_CHANGED The device has a different medium in it or the\r | |
837 | medium is no longer supported. Any existing\r | |
838 | file handles for this volume are no longer\r | |
839 | valid. To access the files on the new medium,\r | |
840 | the volume must be reopened with OpenVolume().\r | |
841 | **/\r | |
842 | STATIC\r | |
843 | EFI_STATUS\r | |
844 | EFIAPI\r | |
845 | StubFileSystemOpenVolume (\r | |
ac0a286f MK |
846 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r |
847 | OUT EFI_FILE_PROTOCOL **Root\r | |
57f9b7f8 AB |
848 | )\r |
849 | {\r | |
ac0a286f | 850 | STUB_FILE *StubFile;\r |
57f9b7f8 AB |
851 | \r |
852 | StubFile = AllocatePool (sizeof *StubFile);\r | |
853 | if (StubFile == NULL) {\r | |
854 | return EFI_OUT_OF_RESOURCES;\r | |
855 | }\r | |
856 | \r | |
857 | StubFile->Signature = STUB_FILE_SIG;\r | |
858 | StubFile->BlobType = KernelBlobTypeMax;\r | |
859 | StubFile->Position = 0;\r | |
ac0a286f MK |
860 | CopyMem (\r |
861 | &StubFile->File,\r | |
862 | &mEfiFileProtocolTemplate,\r | |
863 | sizeof mEfiFileProtocolTemplate\r | |
864 | );\r | |
57f9b7f8 AB |
865 | *Root = &StubFile->File;\r |
866 | \r | |
867 | return EFI_SUCCESS;\r | |
868 | }\r | |
869 | \r | |
ac0a286f | 870 | STATIC CONST EFI_SIMPLE_FILE_SYSTEM_PROTOCOL mFileSystem = {\r |
57f9b7f8 AB |
871 | EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION,\r |
872 | StubFileSystemOpenVolume\r | |
873 | };\r | |
874 | \r | |
f98608ab AB |
875 | STATIC\r |
876 | EFI_STATUS\r | |
877 | EFIAPI\r | |
878 | InitrdLoadFile2 (\r | |
ac0a286f MK |
879 | IN EFI_LOAD_FILE2_PROTOCOL *This,\r |
880 | IN EFI_DEVICE_PATH_PROTOCOL *FilePath,\r | |
881 | IN BOOLEAN BootPolicy,\r | |
882 | IN OUT UINTN *BufferSize,\r | |
883 | OUT VOID *Buffer OPTIONAL\r | |
f98608ab AB |
884 | )\r |
885 | {\r | |
ac0a286f | 886 | CONST KERNEL_BLOB *InitrdBlob = &mKernelBlob[KernelBlobTypeInitrd];\r |
f98608ab AB |
887 | \r |
888 | ASSERT (InitrdBlob->Size > 0);\r | |
889 | \r | |
890 | if (BootPolicy) {\r | |
891 | return EFI_UNSUPPORTED;\r | |
892 | }\r | |
893 | \r | |
ac0a286f | 894 | if ((BufferSize == NULL) || !IsDevicePathValid (FilePath, 0)) {\r |
f98608ab AB |
895 | return EFI_INVALID_PARAMETER;\r |
896 | }\r | |
897 | \r | |
ac0a286f MK |
898 | if ((FilePath->Type != END_DEVICE_PATH_TYPE) ||\r |
899 | (FilePath->SubType != END_ENTIRE_DEVICE_PATH_SUBTYPE))\r | |
900 | {\r | |
f98608ab AB |
901 | return EFI_NOT_FOUND;\r |
902 | }\r | |
903 | \r | |
ac0a286f | 904 | if ((Buffer == NULL) || (*BufferSize < InitrdBlob->Size)) {\r |
f98608ab AB |
905 | *BufferSize = InitrdBlob->Size;\r |
906 | return EFI_BUFFER_TOO_SMALL;\r | |
907 | }\r | |
908 | \r | |
909 | CopyMem (Buffer, InitrdBlob->Data, InitrdBlob->Size);\r | |
910 | \r | |
911 | *BufferSize = InitrdBlob->Size;\r | |
912 | return EFI_SUCCESS;\r | |
913 | }\r | |
914 | \r | |
ac0a286f | 915 | STATIC CONST EFI_LOAD_FILE2_PROTOCOL mInitrdLoadFile2 = {\r |
f98608ab AB |
916 | InitrdLoadFile2,\r |
917 | };\r | |
57f9b7f8 AB |
918 | \r |
919 | //\r | |
920 | // Utility functions.\r | |
921 | //\r | |
922 | \r | |
923 | /**\r | |
924 | Populate a blob in mKernelBlob.\r | |
925 | \r | |
926 | param[in,out] Blob Pointer to the KERNEL_BLOB element in mKernelBlob that is\r | |
927 | to be filled from fw_cfg.\r | |
928 | \r | |
929 | @retval EFI_SUCCESS Blob has been populated. If fw_cfg reported a\r | |
930 | size of zero for the blob, then Blob->Data has\r | |
931 | been left unchanged.\r | |
932 | \r | |
933 | @retval EFI_OUT_OF_RESOURCES Failed to allocate memory for Blob->Data.\r | |
934 | **/\r | |
935 | STATIC\r | |
936 | EFI_STATUS\r | |
937 | FetchBlob (\r | |
ac0a286f | 938 | IN OUT KERNEL_BLOB *Blob\r |
57f9b7f8 AB |
939 | )\r |
940 | {\r | |
ac0a286f MK |
941 | UINT32 Left;\r |
942 | UINTN Idx;\r | |
943 | UINT8 *ChunkData;\r | |
57f9b7f8 AB |
944 | \r |
945 | //\r | |
946 | // Read blob size.\r | |
947 | //\r | |
0758a8e9 AB |
948 | Blob->Size = 0;\r |
949 | for (Idx = 0; Idx < ARRAY_SIZE (Blob->FwCfgItem); Idx++) {\r | |
950 | if (Blob->FwCfgItem[Idx].SizeKey == 0) {\r | |
951 | break;\r | |
952 | }\r | |
ac0a286f | 953 | \r |
0758a8e9 AB |
954 | QemuFwCfgSelectItem (Blob->FwCfgItem[Idx].SizeKey);\r |
955 | Blob->FwCfgItem[Idx].Size = QemuFwCfgRead32 ();\r | |
ac0a286f | 956 | Blob->Size += Blob->FwCfgItem[Idx].Size;\r |
0758a8e9 | 957 | }\r |
ac0a286f | 958 | \r |
57f9b7f8 AB |
959 | if (Blob->Size == 0) {\r |
960 | return EFI_SUCCESS;\r | |
961 | }\r | |
962 | \r | |
963 | //\r | |
964 | // Read blob.\r | |
965 | //\r | |
24b0e9d1 | 966 | Blob->Data = AllocatePool (Blob->Size);\r |
57f9b7f8 | 967 | if (Blob->Data == NULL) {\r |
ac0a286f MK |
968 | DEBUG ((\r |
969 | DEBUG_ERROR,\r | |
970 | "%a: failed to allocate %Ld bytes for \"%s\"\n",\r | |
971 | __FUNCTION__,\r | |
972 | (INT64)Blob->Size,\r | |
973 | Blob->Name\r | |
974 | ));\r | |
57f9b7f8 AB |
975 | return EFI_OUT_OF_RESOURCES;\r |
976 | }\r | |
977 | \r | |
ac0a286f MK |
978 | DEBUG ((\r |
979 | DEBUG_INFO,\r | |
980 | "%a: loading %Ld bytes for \"%s\"\n",\r | |
981 | __FUNCTION__,\r | |
982 | (INT64)Blob->Size,\r | |
983 | Blob->Name\r | |
984 | ));\r | |
0758a8e9 AB |
985 | \r |
986 | ChunkData = Blob->Data;\r | |
987 | for (Idx = 0; Idx < ARRAY_SIZE (Blob->FwCfgItem); Idx++) {\r | |
988 | if (Blob->FwCfgItem[Idx].DataKey == 0) {\r | |
989 | break;\r | |
990 | }\r | |
ac0a286f | 991 | \r |
0758a8e9 AB |
992 | QemuFwCfgSelectItem (Blob->FwCfgItem[Idx].DataKey);\r |
993 | \r | |
994 | Left = Blob->FwCfgItem[Idx].Size;\r | |
995 | while (Left > 0) {\r | |
ac0a286f | 996 | UINT32 Chunk;\r |
0758a8e9 AB |
997 | \r |
998 | Chunk = (Left < SIZE_1MB) ? Left : SIZE_1MB;\r | |
999 | QemuFwCfgReadBytes (Chunk, ChunkData + Blob->FwCfgItem[Idx].Size - Left);\r | |
1000 | Left -= Chunk;\r | |
ac0a286f MK |
1001 | DEBUG ((\r |
1002 | DEBUG_VERBOSE,\r | |
1003 | "%a: %Ld bytes remaining for \"%s\" (%d)\n",\r | |
1004 | __FUNCTION__,\r | |
1005 | (INT64)Left,\r | |
1006 | Blob->Name,\r | |
1007 | (INT32)Idx\r | |
1008 | ));\r | |
0758a8e9 AB |
1009 | }\r |
1010 | \r | |
1011 | ChunkData += Blob->FwCfgItem[Idx].Size;\r | |
1012 | }\r | |
1013 | \r | |
57f9b7f8 AB |
1014 | return EFI_SUCCESS;\r |
1015 | }\r | |
1016 | \r | |
57f9b7f8 AB |
1017 | //\r |
1018 | // The entry point of the feature.\r | |
1019 | //\r | |
1020 | \r | |
1021 | /**\r | |
1022 | Download the kernel, the initial ramdisk, and the kernel command line from\r | |
1023 | QEMU's fw_cfg. Construct a minimal SimpleFileSystem that contains the two\r | |
1024 | image files.\r | |
1025 | \r | |
1026 | @retval EFI_NOT_FOUND Kernel image was not found.\r | |
1027 | @retval EFI_OUT_OF_RESOURCES Memory allocation failed.\r | |
1028 | @retval EFI_PROTOCOL_ERROR Unterminated kernel command line.\r | |
1029 | \r | |
1030 | @return Error codes from any of the underlying\r | |
1031 | functions. On success, the function doesn't\r | |
1032 | return.\r | |
1033 | **/\r | |
1034 | EFI_STATUS\r | |
1035 | EFIAPI\r | |
1036 | QemuKernelLoaderFsDxeEntrypoint (\r | |
ac0a286f MK |
1037 | IN EFI_HANDLE ImageHandle,\r |
1038 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
57f9b7f8 AB |
1039 | )\r |
1040 | {\r | |
ac0a286f MK |
1041 | UINTN BlobType;\r |
1042 | KERNEL_BLOB *CurrentBlob;\r | |
1043 | KERNEL_BLOB *KernelBlob;\r | |
1044 | EFI_STATUS Status;\r | |
1045 | EFI_HANDLE FileSystemHandle;\r | |
1046 | EFI_HANDLE InitrdLoadFile2Handle;\r | |
57f9b7f8 AB |
1047 | \r |
1048 | if (!QemuFwCfgIsAvailable ()) {\r | |
1049 | return EFI_NOT_FOUND;\r | |
1050 | }\r | |
1051 | \r | |
1052 | Status = gRT->GetTime (&mInitTime, NULL /* Capabilities */);\r | |
1053 | if (EFI_ERROR (Status)) {\r | |
1054 | DEBUG ((DEBUG_ERROR, "%a: GetTime(): %r\n", __FUNCTION__, Status));\r | |
1055 | return Status;\r | |
1056 | }\r | |
1057 | \r | |
1058 | //\r | |
1059 | // Fetch all blobs.\r | |
1060 | //\r | |
1061 | for (BlobType = 0; BlobType < KernelBlobTypeMax; ++BlobType) {\r | |
1062 | CurrentBlob = &mKernelBlob[BlobType];\r | |
ac0a286f | 1063 | Status = FetchBlob (CurrentBlob);\r |
57f9b7f8 AB |
1064 | if (EFI_ERROR (Status)) {\r |
1065 | goto FreeBlobs;\r | |
1066 | }\r | |
ac0a286f | 1067 | \r |
d10ad844 DM |
1068 | Status = VerifyBlob (\r |
1069 | CurrentBlob->Name,\r | |
1070 | CurrentBlob->Data,\r | |
1071 | CurrentBlob->Size\r | |
1072 | );\r | |
1073 | if (EFI_ERROR (Status)) {\r | |
1074 | goto FreeBlobs;\r | |
1075 | }\r | |
ac0a286f | 1076 | \r |
57f9b7f8 AB |
1077 | mTotalBlobBytes += CurrentBlob->Size;\r |
1078 | }\r | |
ac0a286f MK |
1079 | \r |
1080 | KernelBlob = &mKernelBlob[KernelBlobTypeKernel];\r | |
57f9b7f8 AB |
1081 | \r |
1082 | if (KernelBlob->Data == NULL) {\r | |
1083 | Status = EFI_NOT_FOUND;\r | |
1084 | goto FreeBlobs;\r | |
1085 | }\r | |
1086 | \r | |
1087 | //\r | |
1088 | // Create a new handle with a single VenMedia() node device path protocol on\r | |
1089 | // it, plus a custom SimpleFileSystem protocol on it.\r | |
1090 | //\r | |
1091 | FileSystemHandle = NULL;\r | |
ac0a286f MK |
1092 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1093 | &FileSystemHandle,\r | |
1094 | &gEfiDevicePathProtocolGuid,\r | |
1095 | &mFileSystemDevicePath,\r | |
1096 | &gEfiSimpleFileSystemProtocolGuid,\r | |
1097 | &mFileSystem,\r | |
1098 | NULL\r | |
1099 | );\r | |
57f9b7f8 | 1100 | if (EFI_ERROR (Status)) {\r |
ac0a286f MK |
1101 | DEBUG ((\r |
1102 | DEBUG_ERROR,\r | |
1103 | "%a: InstallMultipleProtocolInterfaces(): %r\n",\r | |
1104 | __FUNCTION__,\r | |
1105 | Status\r | |
1106 | ));\r | |
57f9b7f8 AB |
1107 | goto FreeBlobs;\r |
1108 | }\r | |
1109 | \r | |
f98608ab AB |
1110 | if (KernelBlob[KernelBlobTypeInitrd].Size > 0) {\r |
1111 | InitrdLoadFile2Handle = NULL;\r | |
ac0a286f MK |
1112 | Status = gBS->InstallMultipleProtocolInterfaces (\r |
1113 | &InitrdLoadFile2Handle,\r | |
1114 | &gEfiDevicePathProtocolGuid,\r | |
1115 | &mInitrdDevicePath,\r | |
1116 | &gEfiLoadFile2ProtocolGuid,\r | |
1117 | &mInitrdLoadFile2,\r | |
1118 | NULL\r | |
1119 | );\r | |
f98608ab | 1120 | if (EFI_ERROR (Status)) {\r |
ac0a286f MK |
1121 | DEBUG ((\r |
1122 | DEBUG_ERROR,\r | |
1123 | "%a: InstallMultipleProtocolInterfaces(): %r\n",\r | |
1124 | __FUNCTION__,\r | |
1125 | Status\r | |
1126 | ));\r | |
f98608ab AB |
1127 | goto UninstallFileSystemHandle;\r |
1128 | }\r | |
1129 | }\r | |
1130 | \r | |
57f9b7f8 AB |
1131 | return EFI_SUCCESS;\r |
1132 | \r | |
f98608ab | 1133 | UninstallFileSystemHandle:\r |
ac0a286f MK |
1134 | Status = gBS->UninstallMultipleProtocolInterfaces (\r |
1135 | FileSystemHandle,\r | |
1136 | &gEfiDevicePathProtocolGuid,\r | |
1137 | &mFileSystemDevicePath,\r | |
1138 | &gEfiSimpleFileSystemProtocolGuid,\r | |
1139 | &mFileSystem,\r | |
1140 | NULL\r | |
1141 | );\r | |
f98608ab AB |
1142 | ASSERT_EFI_ERROR (Status);\r |
1143 | \r | |
57f9b7f8 AB |
1144 | FreeBlobs:\r |
1145 | while (BlobType > 0) {\r | |
1146 | CurrentBlob = &mKernelBlob[--BlobType];\r | |
1147 | if (CurrentBlob->Data != NULL) {\r | |
24b0e9d1 | 1148 | FreePool (CurrentBlob->Data);\r |
57f9b7f8 AB |
1149 | CurrentBlob->Size = 0;\r |
1150 | CurrentBlob->Data = NULL;\r | |
1151 | }\r | |
1152 | }\r | |
1153 | \r | |
1154 | return Status;\r | |
1155 | }\r |